Glab W L, Hessler J P
Appl Opt. 1988 Dec 15;27(24):5123-6. doi: 10.1364/AO.27.005123.
We have measured the spectral properties of the fourth anti-Stokes component of the output of a pressurized, molecular hydrogen, Raman shifter pumped by the intense output of a frequency-doubled narrowband pulsed dye laser. All the observed line shapes are asymmetric, with full widths at half-maximum ranging from 0.3 to 0.8 cm(-1). The spectral peak of the Raman-shifted light varies linearly with the intensity of the pump light and is given by sigma(rho,I) = sigma(rho) + AI. The previously measured density-dependent Stokes shift is sigma(rho), the intensity of the laser is I, and A is 1.5 +/- 0.2 cm(-1)/(TW/cm(2)). The electric field-induced shift and asymmetric line shape limit the accuracy and resolution of spectroscopic measurements made with light from a hydrogen Raman shifter. We propose that these observations may be explained by the ac Stark effect in the Raman shifting medium.
我们测量了由倍频窄带脉冲染料激光器的强输出泵浦的高压分子氢拉曼频移器输出的第四反斯托克斯分量的光谱特性。所有观察到的线形都是不对称的，半高全宽范围为0.3至0.8厘米⁻¹。拉曼频移光的光谱峰值随泵浦光强度线性变化，由σ(ρ, I) = σ(ρ) + AI给出。先前测量的与密度相关的斯托克斯频移为σ(ρ)，激光强度为I，A为1.5±0.2厘米⁻¹/(太瓦/厘米²)。电场诱导的频移和不对称线形限制了用氢拉曼频移器的光进行光谱测量的精度和分辨率。我们认为这些观察结果可能由拉曼频移介质中的交流斯塔克效应来解释。
